So I am designing another driver for high power blue LD. PCB etching is always a nightmare to me. I ended up picking up my hand drill and engrave the board myself. To be honest. It save me up to 500% time to make the board this way. Oh yeah it doesn't look good but who care? The last picture does loo like a sim card to me :D. Will solder the components will I have spare time. Thanks for watching.
Update:
Finally have time to complete this board. Well it doesn't look good as expected but it does work well IMO
While it reach its specification (3A). I am not going to drive it any harder cos this thing is hot. 3A should pretty enough for most application. :evil: I am still experimenting with varies IC I recently targeted. Will see if any other chip perform better.